What this MCCB is and what it does
The Siemens 3VA1163-6EF36-0KC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 63 A at 40 °C, and derates predictably through 70 °C — still delivering 58 A at the top of its operating range. That thermal curve matters when you're packing breakers into a closed enclosure; the 17.3 W maximum power loss adds up across multiple poles. Three-pole construction, rated insulation voltage 800 V. The interrupting capacity is the headline here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. That's serious fault-clearing muscle — this breaker handles high available fault currents without needing a current-limiting fuse upstream.
Built-in accessories and what they mean for panel wiring
Factory-fitted with a shunt trip release (STL) and two auxiliary switches HQ. The shunt trip lets you remotely trip the breaker from a PLC or emergency-stop circuit — no separate undervoltage release module needed. The two HQ auxiliary switches provide status feedback (open/closed/tripped) back to the control system. No communication module on this variant; it's a straight line-protection device. Dimensions: 130 mm height, 76.2 mm width (3 inches), 70 mm depth. That 3-inch width is standard for a 3-pole MCCB in this class — fits existing SENTRON panel footprints and busbar systems without re-drilling. Operating temperature range -25 °C to 70 °C; storage from -40 °C to 80 °C. No trip indicator window on this variant.
Where it fits in the panel
Mounts on a DIN rail or direct-panel mount in a standard distribution enclosure. The 70 mm depth leaves room for rear-connected busbars and cable ducting behind the breaker — no need to oversize the enclosure for this unit alone.